USGS Data Series 1090: Hydrogeologic Framework for Characterization and Occurrence of Confined and Unconfined Aquifers in Quaternary Sediments in the Glaciated Conterminous United States

Data Series 1090

Figure 1

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EXPLANATION

4° x 6° quads, Quaternary Atlas, Fullerton and others (variously dated)

Quaternary Atlas, Fullerton and others (variously dated)

Surficial Material Map, Soller and others (2009)

Figure 1. Distribution of source data from the Quaternary Atlas (Fullerton and Richmond, variously dated) and Surficial Materials Map (Soller and others, 2009) coverages used for the Glacial Environment and Surficial Sediments geodatabase for the glaciated conterminous United States.

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